Russell, D.A. (1972). "Ostrich dinosaurs from the Late Cretaceous of Western Canada". Canadian Journal of Earth Sciences. 9 (4): 375–402. Bibcode:1972CaJES...9..375R. doi:10.1139/e72-031.
Russell, D.A. (1972). "Ostrich dinosaurs from the Late Cretaceous of Western Canada". Canadian Journal of Earth Sciences. 9 (4): 375–402. Bibcode:1972CaJES...9..375R. doi:10.1139/e72-031.